What humanity does isn't "thought", by and large. Not in any meaningful sense. It's mostly the expression of prejudices combined with associational triggers and repeating what others say.

Part of becoming an effective thinker is recognizing that unpleasant realities need to be acknowledged even when we'd prefer they weren't the case. For people living in this time, in this place, one of those truths is that we're surrounded by blatant stupidity. Even worse, we're blatantly stupid a lot of the time.

Deriving those conclusions from the evidence, and then acknowledging their validity, is one of the basic necessary steps to becoming better. No problem can be (expected to be) solved if we deny its reality.